Pivoted bucket conveyer



May 22, 1928.

H. DRAEG E R PIVOTED BUCKET CONVEYER 5 ll i itw Filed Set.

N\ i N May 22, 1928. 1,671,017

- L. H. DRAEGER PIVOTED BUCKET CONVEYER Filed Se 1.1

' IIIIIIIIIIA lllll May 22, 1928.

i L. H. DRAEGER PIVOTED BUCKET CONVEYER l Qwoemtoz Filed Sept.

Patented May 22, 1928.

UNITED STATES PATENT OFFICE.

LLOYD H. DRAEGER, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO CHAIN BELT COM-?ANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

PIVOTED BUCKET CONVE'YER.

Application filed September 11, 1926. Serial No. 134,891.

My invention relates to conveying apparatus ofthe endless, pivotedbuckettype and has for its object to provide improved means for arring thebucketswhen. in tipped or inverted position to eifect discharge of thematerial beingconveyed thereby, and for as sisting. in restoring thebuckets to normal positions after they havebeen discharged.

In the accompanying drawings, Fig. 1 is a side view of conveyingapparatus embodying my invention.

Fig. 2 is a transverse sectional view on the line II.II of Fig. 1. v

i Fig. 3 is a side view illustrating a bucket in dumping position, andthe bumper which operatesto jar it just ready to deliver its blow.-

Figs. 4 and 5 are views similar to Fig. 3 except that they illustratesuccessively advanced positions of the bucket as it is righting itself.

In the drawings A indicates bucketswhich are receiving and transmittingelements-of an endless conveying apparatus of well known type, and B thesprocket or drive chains by which the pivoted buckets are.

supported and moved. At the joints or articulations of the chain thereare rollers C, adapted to travel upon tracks F that parallel the courseof the conveyer. The buckets A are supported so as to. be free to swing,upon pivots D, supported in the links of the chains and located betweenadjacent rollers C. Each bucket is provided at one, or each, end with acam E that is secured fast to its outer face, which cam is adapted toengage with a stationary cam G, located adjacent to the track F and inthe path of the cams E. The cam G is suitably supported and may beeither fixed, or adjustable so as to be moved into or out of operativeposition at will, both forms of stationary cam being well known in theart.

The apparatus thus far described is of well known construction and, sofar as my invention is concerned, may be variously modified or changedfrom that illustrated in the drawings, as circumstances or the wish ofthe user may suggest.

11 indicates upright supporting frames suitably supported outside thetracks F and adjacent to the stationary cams G, there hearings in whichare mounted pivots 13 and 14. Links 17 are hung upon the pivots 13,being freeto swing thereon, and these links support a bar 16 thatextends across the path of the conveyer and is at such height that thebuckets A, when in normal or horizontal position, may freely passbeneath it. The bar 16, which acts as a bumper to jar the buckets whenin inverted position as represented in Fig. 3, is preferably formed of apiece of timber of such size as to give to it the desired weight. I

15 are. depending bars supported by the pivots 14. They are so disposedthat their free lower ends are in the paths of the rollers or wheels Cof the chains, and are engaged thereby as the conveyer travels in thedirection of the arrow, Fig. 1. The bars 15 and 17 are connected bylinks 18, which are preferably formed with adjusting means 19,

permitting the links to be adjusted as to length in order to insure theproper relations between. the several, parts of the bumper mechanism.

The mechanism atesv as follows:

As a loaded bucket A approaches the place of discharge its cam E engageswith the sta tionary cam G, tilting the bucket into dischargingposition. At or about the time this engagement takes place the advanceroller C of a link supporting the bucket comes into engagementwith thefree end of a bar 15, swinging it, and so moving it out of its path. Themotion imparted to the bar 15 is transmitted to the bar or link thatsupports the transverse bumper bar 16 which is thus carried forwardlyand upwardly to the po* sition indicated in Fig. 3. This view shows thebucket as having been tilted, by the joint action of the cams E and G,into its inverted discharging position. For many substances the mereinversion of the bucket is suflicient thus far described operto effectthe discharge, but for other sub-.

stances, that are of a sticky nature, such for instanceas moist clayused in the manufacture .of bricks. the simple tilting of the arrangedto strike the bucket when in inverted position a sharp blow to jar looseany material that may be inclined to adhere to the walls thereof.

lVhile the bucket was being tilted the bars were being moved forwardlyand upwardly by the rollers C, and the connections of the bars 15 and 17cause the bumper bar to be swung forwardly and upwardly as stated. lVhenthe rollers C advance sulliciently to pass the lower free ends of thebars 15, leaving them unsupported, the bumper bar falls, striking whatis now the advance edge of the inverted bucket a sharp blow. This will,as stated, loose the material within the bucket. The further ad- Vanceof the bucket again lifts the bar 16,

which now rests against the edge of the inverted bucket; its weighttherefore tends to tilt the bucket back to normal position and holds thecams E in close working engagement with the stationary cams G. Thesuccessive position of the parts of the conveyor from the'time thebumper strikes its blow to jar-the bucket until the bucket passes beyondthe line of engagement with the cross bar 16 are indicated .in Figs. 3,4 and 5. Just before this separation, between the bucket A and the bar16, takes place, the moving cams E pass beyond the stationary cams Gleaving the bucket free to return to normal position under the conjointaction of the bumper bar and the weight of the bucket itself, which isso pivotally supported as to teng to right itself after it hasdischarged its 10a Under some circumstances and to better effect thedischarge of some-materials it is desirable that the buckets while intilted po sitions should be jarred, after the primary jarring incidentto the stroke of the bumper bar 16. This I effect by forming the cam Eas illustrated, that is with two projections 2, 3, separatedby adepression 4:; and by forming the stationary cam G with an initial humpor projection 5, a second hump or pro jection b, a depression 7 betweenthese, an abrupt fall 8 at the end of the projection 6 a flat contactsurface 9 beyond the fall 8, and a gradual incline 10 between the edgeof the flat surface 9 and the end of the cam; This arrangement of camsurfaces causes a successive bumping or jarring of the bucket, lessviolent than that produced by the bumper part 16, as the cam E movesover the irregular face of the cam G. As a bucket approaches the cam Gthe projection 2 of the former first comes into engagement with the camG and causes the bucket to be tilted until the projection 3 comes intoengagement withthe upper operating face of the stationary cam, thisengagement of the projection 3 first taking place within the de-'pression 7. The engagement of the projecthe bucket, lifting theprojection 2 entirely free from the surface of the stationary cam. Theprojection 3 of the cam E rests upon the projection 6 of the cam G whenthe primary jar is given to the bucket by the stroke of the bumper bar16, the position of the parts being indicated in Fig. The furtherforward movement of the bucket carries the projection 3 over the edge ofthe abrupt fall 8 of the cam G. When this occurs, the bucket beingunsupported, swings backward toward its normal position until arrestedby the engagement of the projection 3 with the flat face 9.Thispovsition is indicated in Fig. 4, and the movement last describedresults in a: slight jar being imparted to the bucket. l/Vhen theadvance of the bucket carries the projection 3 beyond the forward edgeof the flat face 9 of the cam G, the bucket,'being then free, swingstoward its normal position until a1,- rested by the engagement of theprojection 2 of the cam E with the projection 6 of the cam G, whereuponthere is a second shock or jar, this position being indicated in Fig. 5,A third jar takes place when the projection 2 passes across the edge ofthe abrupt fall 8 and is thereafter arrestedby engagement with the flatface 9 of the cam. the projection 2 passes beyond the forward edge ofthe face 9 of the cam G the bucket graduallyrights itself, this forwardmovement being gradual, due to the shapes of the edges 10 andQO-respeotively of the cams G and E, It will be understood that theforce or violence of the successive bumps or.

jars given to the bucket is increased by the engagement ofthe bumperbarwith the edge of the bucket, which thus adds its weight to the bucketand not only tends to restore it to normal position but alsoaccelerates-its movements.

It will be observed that the cam E is symmetrical, that is to say, itscurves on opposite sides of a vertical line passing'through the pivot Dwhen the bucket is in'normal, horizontal position, are similar. Thispermits the cam to properly functionwhichever edge of the bucket isforward, and further- 7 Then when for tilting the buckets todumpingposition,

of a moving bumper that forcible strikes the tion 3 with the stationarycam further tiltsbuckets and causes them to be jarred when in tilteddischarging position and means operated by the movement of the conveyerfor operating the bumper. Y

3. In a tilting bucket conveyer the combination with tilting buckets,chains which support and move them and coacting cams for tilting thebuckets to dumping position, of a swinging bumper that forcibly strikesthe buckets to jar them when in tilted discharging position and meansoperated by the forward movements of the conveyer for swinging thebumper to an elevated position and then releasing it to permit it todeliver its stroke while the buckets are inverted.

4. In a tilting bucket conveyer the combination with tilting buckets,chains which support and move them, and coating cams for successivelytilting the buckets to dumping position, of a bumper supported acrossand above the path of movement of the buckets, and means forsuccessively lifting the bumper prior to the buckets coming to tilteddischarging position and for releasing it and permitting it to strikethe buckets while in such discharging position.

5. In a tilting bucket conveyer the combination with tilting buckets,chains which support and move them, and coacting cams for successivelytilting the buckets to dumping position, of a swinging bumper supportedacross and above the path of movement of the buckets, and means operatedby the moving conveyer for successively swinging the bumper into anelevated position and for releasing it and permitting it to strike thebuckets while the buckets are in discharging position.

6. In a tilting bucket conveyer the combination with tilting buckets,chains which support and move them, and coact-ing cams ior successivelytilting the buckets to dumping position, of a swinging bumper supportedacross and above the path of movement of the buckets, contact barsoperated by the moving conveyer and connections between the contact barsand the supported bumper through which the movements of the bars causethe bumper to be moved, the

contact bars being arranged to be engaged and operated bymoving parts ofthe conveyer to swing the bumper into elevated position as the bumpersare being tilted and to release the bumper bar permitting it to fall andstrike the buckets while in tilted position.

7. In a tilting bucket conveyer the com- I bination with tiltingbuckets, chains which support and move them provided with supportingwheels, tracks on which the wheels travel and coacting cams forsuccessively tilting the buckets to dumping position, of a swingingbumper bar extending across the conveyer adjacent to the location of thecams that cause the buckets to be tilted, pivotally supp'orted contactbars the free ends of which are in the paths of movement of the wheelsof the chains by which they are swung as the wheels successively passthem, and links connecting the contact bars with the swinging bumper,the parts being arranged so thatithe bumper is successively swung intoan elevated position as the buck-' ets are being tilted, and is releasedand allowed to fall and strike the successive buckets while they are indischarging position.

8. In a tilting bucket conveyer the combination with tilting buckets,chains which support and move them and coacting cams for tilting thebuckets to dumping position, of a bumper that forcibly strikes thebuckets and causes them to be jarred while in tilted dischargingposition, the bumper being arranged to remain in contact with the bucketafter delivering its jar ringstroke and assisting in restoring thebuckets to their normal position.

9. In a'tilting bucket conveyer the combination with tiltin buckets,chains which support and move them and coacting cams for tilting thebuckets to dumping position. of a swinging ponderous bumper thatforcibly strikes the buckets and causes them to be jarred while intilted discharging position, the bumper being arranged to remain incontact with the bucket after delivering its jarring stroke andassisting by its weight in restoring the buckets to their normalpositions.

10. In a tilting bucket conveyer combination with tilting buckets,chains which support and move them and coacting cams for tilting thebuckets to dumping position, of a ponderous swinging bumper barsupported above and across the conveyer adjacent to the dumpingcams, andmeans operated by the moving conveyer for successively swinging thebumper bar into elevated position and releasing itso it will fall andstrike the bucket whilein tilted discharging position, the bumper barremaining in engagement with the bucket after delivering its blow untilthe bucket passes beyond the bar, and thus assisting by its weight inrestoring the buckets to normal position.

11. In a tilting bucket conveyer the combination of tilting buckets,chains which support and move them, coacting cams arranged tosuccessively tilt the buckets into dumping position and to jar thebuckets after being tilted, and a bumper that forcibly strikes thebuckets while in tilted position, jarring jcctions 2 and 3 separated bya depression;

and stationary cams G cooperating with the cams carried by the bucketsto tilt the latter to discharging position and to'jar them when in suchposition, and then to restore them to normal carrying position withouttheir being completely revolved. the stationary cams being formed withthe projections 5 and 6 separated by a depression for tilting LLOYD H.DRAEGER.

GERTIFIGATE 0 CORRECTION.

Patent No. 1,671,017. Granted May 22, 1928,10

more a. DRAEGER.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 129, claim 2, for the word "forcible" read "forcibly"; page 3, line53, claim 6, for the word "bumpers" read "buckets"; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of June, A. D. 1928.

M. J. Moore, (Seal) Acting Commissioner of Patents.-

